LS6 stumble
I have an LS6 in a '64 Chevelle that has a stumble under load. It acts like fuel starvation. If I lift, it will rev to limiter. Engine is stock internally, long tubes, mail order tune by PCM of NC. During testing last year before paint & body, no apparent problems. Idles good, revs good with no load. I do have a P0336 code and it won't do a crank relearn with Tech II scanner. Scanner showed good signal from crank and cam position sensors and no misfires. 60psi fuel pressure, plugs look lean.
Any suggestions?
Last edited by alschoon; Aug 7, 2016 at 11:08 AM.





